Midterm 2 (3.2.3)

Question 1

Phragmoplast

Answer 1

group of microtubules between daughter nuclei of dividing cell; cell plate then develops in the middle; leads to cell wall

Question 2

Gametophyte

Answer 2

Multicellular haploid form

Produces haploid gametes by mitosis

Haploid gametes unite and develop into sporophyte

Question 3

Sporophyte

Answer 3

Multicellular diploid form

Results from union of
gametes
Produces haploid spores by meiosis
Spores develop into gametophytes by mitosis

Question 4

Bryophytes

Answer 4

Nonvascular plants

Question 5

Pterophytes: ferns and relatives - the first vascular plants

Answer 5

Have vascular tissue
- true roots and leaves

Sperm require water to swim to egg

Seedless vascular plants common in damp environments

Sporophytes not dependent on gametophyte for nutrition

Question 6

Xylem

Answer 6

Transports water and minerals upwards from roots

Composed of tracheids + vessel elements (dead cells)

Lignified (contain lignin)

Question 7

Phloem

Answer 7

Transport products of photosynthesis from leaves to rest of plant

Composed of living cells
• Sieve elements
• Companion cells

Question 8

Stomata

Answer 8

Gas exchange
- Carbon dioxyde in
- Oxygen out

Question 9

Gymnosperms: Phylum Coniferophyta

Answer 9

Seed plants

Seeds not enclosed in chambers
-“Naked” seeds

Conifers are well-known gymnosperms

Pollen
- water no longer required for fertilization

Question 10

Angiosperms (anthophyta)

Answer 10

Represent 90% of living plant spp.(species plural)

Seed plants

Seeds develop within
ovaries
– Originate from FLOWER
– Mature into FRUIT